generate order model
generate orders controller
build out orders_controller with basic CRUD actions
add associations for orders to user and cow models
add mailer call to orders controller
add validations to order model
Merge branch 'master' into ryan/orders

merge latest changes from upstream
add set_cow before_action for order create and update actions
update migration to add default value
update users fixtures
update orders fixture
update cows fixture
update gemfile to add pry to test environment
write test for amount_left validation in order model
update amount_left validation to pass tests
migrate db
Merge pull request #7 from vidkun/ryan/orders

Merged #7.